class Solution {
public:
    bool isUgly(int n) {
        if (n < 1)
            return 0;
        if (n < 1)
            return false;
        while (n % 5 == 0)
            n /= 5;
        while (n % 3 == 0)
            n /= 3;
        while (n % 2 == 0)
            n /= 2;
        if (n == 1)
            return true;
        return false;
    }
};